Camrelizumab plus gemcitabine and oxaliplatin (GEMOX) in patients with advanced biliary tract cancer: a single-arm, open-label, phase II trial ============================================================================================================================================== * Xiaofeng Chen * Xiaofeng Wu * Hao Wu * Yanhong Gu * Yang Shao * Qianwen Shao * Feipeng Zhu * Xiao Li * Xiaofeng Qian * Jun Hu * Fengjiao Zhao * Weidong Mao * Jing Sun * Jian Wang * Gaohua Han * Changxian Li * Yongxiang Xia * Poshita Kumari Seesaha * Dongqin Zhu * Huajun Li * Junling Zhang * Guoqiang Wang * Xuehao Wang * Xiangcheng Li * Yongqian Shu